I see a more substantial problem, and a couple/few people have indirectly addressed it already (except for Luna!, who is nailing it quite hard).
The answer to a (large) community of people that does not integrate TGs is not a community that does not integrate non-TGs. You aren't going to kick SOs to the curb. You aren't going to forbid "questioning" people, nor will you get rid of them out just because they determine they are not TG. The standard for who is TG is not exactly clear-cut or permanent. I don't think you want to separate yourself from non-TG open-minded friends. There are even TGs who are anti-TG (or at least against some subset of TGs), so it is not as if keeping out the "outsiders" solves the problem of discrimination/intimidation/exclusion/etc.
I propose the idea of something that is both more ambitious and also simpler: Have a community where people across a broad spectrum of factors are accepted and integrated, whether they are a "minority" or not. Race, ethnicity, sex, gender, gender expression, sexual orientation, hair color, height, etc, are not appropriate for discrimination/intimidation/exclusion/etc. Corporations that do business here must also play by the rules we want (including insurance companies needing to provide SRS as appropriate -- unless we take the government-managed route). Such a community in the US might only appeal to 20% of its population, and only 1-in-1000 may be willing to drop what they are doing to go there, but that's 60000 people. It will probably be disproportionately loaded with "minorities" of several types, but that'll provide a little flavor that'll help TGs and others not feel so alone/isolated.
The whole idea is to have a community that makes sure its members are engaged in a fair and supportive way. There are certain challenges, but it provides a reasonably integrated society and still provides the services you want. And I imagine TGs would typically prefer living as their respective genders (as unique as that expression may be, and as bumpy of a road as it has been to get where they want) rather than as TGs.